1 files changed, 51 insertions, 155 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index bbd8d0027e2f..11fd9f2c4093 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -256,7 +256,10 @@ struct sk_buff {
         ktime_t                 tstamp;
         struct net_device       *dev;
 
-        struct  dst_entry       *dst;
+        union {
+                struct  dst_entry       *dst;
+                struct  rtable          *rtable;
+        };
         struct  sec_path        *sp;
 
         /*
@@ -310,7 +313,10 @@ struct sk_buff {
         __u16                   tc_verd;        /* traffic control verdict */
 #endif
 #endif
-        /* 2 byte hole */
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+        __u8                    ndisc_nodetype:2;
+#endif
+        /* 14 bit hole */
 
 #ifdef CONFIG_NET_DMA
         dma_cookie_t            dma_cookie;
@@ -657,11 +663,21 @@ static inline void skb_queue_head_init_class(struct sk_buff_head *list,
 }
 
 /*
- *      Insert an sk_buff at the start of a list.
+ *      Insert an sk_buff on a list.
  *
  *      The "__skb_xxxx()" functions are the non-atomic ones that
  *      can only be called with interrupts disabled.
  */
+extern void        skb_insert(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list);
+static inline void __skb_insert(struct sk_buff *newsk,
+                                struct sk_buff *prev, struct sk_buff *next,
+                                struct sk_buff_head *list)
+{
+        newsk->next = next;
+        newsk->prev = prev;
+        next->prev  = prev->next = newsk;
+        list->qlen++;
+}
 
 /**
  *      __skb_queue_after - queue a buffer at the list head
@@ -678,13 +694,17 @@ static inline void __skb_queue_after(struct sk_buff_head *list,
                                      struct sk_buff *prev,
                                      struct sk_buff *newsk)
 {
-        struct sk_buff *next;
-        list->qlen++;
+        __skb_insert(newsk, prev, prev->next, list);
+}
 
-        next = prev->next;
-        newsk->next = next;
-        newsk->prev = prev;
-        next->prev  = prev->next = newsk;
+extern void skb_append(struct sk_buff *old, struct sk_buff *newsk,
+                       struct sk_buff_head *list);
+
+static inline void __skb_queue_before(struct sk_buff_head *list,
+                                      struct sk_buff *next,
+                                      struct sk_buff *newsk)
+{
+        __skb_insert(newsk, next->prev, next, list);
 }
 
 /**
@@ -718,66 +738,7 @@ extern void skb_queue_tail(struct sk_buff_head *list, struct sk_buff *newsk);
 static inline void __skb_queue_tail(struct sk_buff_head *list,
                                    struct sk_buff *newsk)
 {
-        struct sk_buff *prev, *next;
-
-        list->qlen++;
-        next = (struct sk_buff *)list;
-        prev = next->prev;
-        newsk->next = next;
-        newsk->prev = prev;
-        next->prev  = prev->next = newsk;
-}
-
-
-/**
- *      __skb_dequeue - remove from the head of the queue
- *      @list: list to dequeue from
- *
- *      Remove the head of the list. This function does not take any locks
- *      so must be used with appropriate locks held only. The head item is
- *      returned or %NULL if the list is empty.
- */
-extern struct sk_buff *skb_dequeue(struct sk_buff_head *list);
-static inline struct sk_buff *__skb_dequeue(struct sk_buff_head *list)
-{
-        struct sk_buff *next, *prev, *result;
-
-        prev = (struct sk_buff *) list;
-        next = prev->next;
-        result = NULL;
-        if (next != prev) {
-                result       = next;
-                next         = next->next;
-                list->qlen--;
-                next->prev   = prev;
-                prev->next   = next;
-                result->next = result->prev = NULL;
-        }
-        return result;
-}
-
-
-/*
- *      Insert a packet on a list.
- */
-extern void        skb_insert(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list);
-static inline void __skb_insert(struct sk_buff *newsk,
-                                struct sk_buff *prev, struct sk_buff *next,
-                                struct sk_buff_head *list)
-{
-        newsk->next = next;
-        newsk->prev = prev;
-        next->prev  = prev->next = newsk;
-        list->qlen++;
-}
-
-/*
- *      Place a packet after a given packet in a list.
- */
-extern void        skb_append(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list);
-static inline void __skb_append(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list)
-{
-        __skb_insert(newsk, old, old->next, list);
+        __skb_queue_before(list, (struct sk_buff *)list, newsk);
 }
 
 /*
@@ -797,8 +758,22 @@ static inline void __skb_unlink(struct sk_buff *skb, struct sk_buff_head *list)
         prev->next = next;
 }
 
-
-/* XXX: more streamlined implementation */
+/**
+ *      __skb_dequeue - remove from the head of the queue
+ *      @list: list to dequeue from
+ *
+ *      Remove the head of the list. This function does not take any locks
+ *      so must be used with appropriate locks held only. The head item is
+ *      returned or %NULL if the list is empty.
+ */
+extern struct sk_buff *skb_dequeue(struct sk_buff_head *list);
+static inline struct sk_buff *__skb_dequeue(struct sk_buff_head *list)
+{
+        struct sk_buff *skb = skb_peek(list);
+        if (skb)
+                __skb_unlink(skb, list);
+        return skb;
+}
 
 /**
  *      __skb_dequeue_tail - remove from the tail of the queue
@@ -889,6 +864,7 @@ static inline void skb_set_tail_pointer(struct sk_buff *skb, const int offset)
 /*
  *      Add data to an sk_buff
  */
+extern unsigned char *skb_put(struct sk_buff *skb, unsigned int len);
 static inline unsigned char *__skb_put(struct sk_buff *skb, unsigned int len)
 {
         unsigned char *tmp = skb_tail_pointer(skb);
@@ -898,26 +874,7 @@ static inline unsigned char *__skb_put(struct sk_buff *skb, unsigned int len)
         return tmp;
 }
 
-/**
- *      skb_put - add data to a buffer
- *      @skb: buffer to use
- *      @len: amount of data to add
- *
- *      This function extends the used data area of the buffer. If this would
- *      exceed the total buffer size the kernel will panic. A pointer to the
- *      first byte of the extra data is returned.
- */
-static inline unsigned char *skb_put(struct sk_buff *skb, unsigned int len)
-{
-        unsigned char *tmp = skb_tail_pointer(skb);
-        SKB_LINEAR_ASSERT(skb);
-        skb->tail += len;
-        skb->len  += len;
-        if (unlikely(skb->tail > skb->end))
-                skb_over_panic(skb, len, current_text_addr());
-        return tmp;
-}
-
+extern unsigned char *skb_push(struct sk_buff *skb, unsigned int len);
 static inline unsigned char *__skb_push(struct sk_buff *skb, unsigned int len)
 {
         skb->data -= len;
@@ -925,24 +882,7 @@ static inline unsigned char *__skb_push(struct sk_buff *skb, unsigned int len)
         return skb->data;
 }
 
-/**
- *      skb_push - add data to the start of a buffer
- *      @skb: buffer to use
- *      @len: amount of data to add
- *
- *      This function extends the used data area of the buffer at the buffer
- *      start. If this would exceed the total buffer headroom the kernel will
- *      panic. A pointer to the first byte of the extra data is returned.
- */
-static inline unsigned char *skb_push(struct sk_buff *skb, unsigned int len)
-{
-        skb->data -= len;
-        skb->len  += len;
-        if (unlikely(skb->data<skb->head))
-                skb_under_panic(skb, len, current_text_addr());
-        return skb->data;
-}
-
+extern unsigned char *skb_pull(struct sk_buff *skb, unsigned int len);
 static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len)
 {
         skb->len -= len;
@@ -950,21 +890,6 @@ static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len)
         return skb->data += len;
 }
 
-/**
- *      skb_pull - remove data from the start of a buffer
- *      @skb: buffer to use
- *      @len: amount of data to remove
- *
- *      This function removes data from the start of a buffer, returning
- *      the memory to the headroom. A pointer to the next data in the buffer
- *      is returned. Once the data has been pulled future pushes will overwrite
- *      the old data.
- */
-static inline unsigned char *skb_pull(struct sk_buff *skb, unsigned int len)
-{
-        return unlikely(len > skb->len) ? NULL : __skb_pull(skb, len);
-}
-
 extern unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta);
 
 static inline unsigned char *__pskb_pull(struct sk_buff *skb, unsigned int len)
@@ -1205,21 +1130,7 @@ static inline void __skb_trim(struct sk_buff *skb, unsigned int len)
         skb_set_tail_pointer(skb, len);
 }
 
-/**
- *      skb_trim - remove end from a buffer
- *      @skb: buffer to alter
- *      @len: new length
- *
- *      Cut the length of a buffer down by removing data from the tail. If
- *      the buffer is already under the length specified it is not modified.
- *      The skb must be linear.
- */
-static inline void skb_trim(struct sk_buff *skb, unsigned int len)
-{
-        if (skb->len > len)
-                __skb_trim(skb, len);
-}
-
+extern void skb_trim(struct sk_buff *skb, unsigned int len);
 
 static inline int __pskb_trim(struct sk_buff *skb, unsigned int len)
 {
@@ -1302,22 +1213,7 @@ static inline struct sk_buff *__dev_alloc_skb(unsigned int length,
         return skb;
 }
 
-/**
- *      dev_alloc_skb - allocate an skbuff for receiving
- *      @length: length to allocate
- *
- *      Allocate a new &sk_buff and assign it a usage count of one. The
- *      buffer has unspecified headroom built in. Users should allocate
- *      the headroom they think they need without accounting for the
- *      built in space. The built in space is used for optimisations.
- *
- *      %NULL is returned if there is no free memory. Although this function
- *      allocates memory it can be called from an interrupt.
- */
-static inline struct sk_buff *dev_alloc_skb(unsigned int length)
-{
-        return __dev_alloc_skb(length, GFP_ATOMIC);
-}
+extern struct sk_buff *dev_alloc_skb(unsigned int length);
 
 extern struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
                 unsigned int length, gfp_t gfp_mask);